netdev - Re: Lockup with tun/tap/bridge interface deregistration.

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Message-ID: <8763lqj0z2.fsf@barad-dur.regala.cx>
Date:	Thu, 11 Dec 2008 14:27:45 +0100
From:	Mathieu SEGAUD <mathieu.segaud@...ala.cx>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Jarek Poplawski <jarkao2@...il.com>, netdev@...r.kernel.org,
	kernel@...too.org
Subject: Re: Lockup with tun/tap/bridge interface deregistration.

Vous m'avez dit récemment :

> On Thu, Dec 11, 2008 at 10:43:03AM +0000, Jarek Poplawski wrote:
>> On Thu, Dec 11, 2008 at 10:24:21AM +0000, Jarek Poplawski wrote:
>> ...
>> > Could you try e.g. 2.6.27.7 or something with this patch?:
>> > 
>> > http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=commit;h=58ec3b4db9eb5a28e3aec5f407a54e28f7039c19
>> 
>> Oops! 2.6.27.4 has this too...
>
> Right, this fixes a dead-lock that causes the RTNL to be held which
> doesn't seem to be the case here.  It sounds like the problem in
> this thread is simply due to a non-zero ref count on the netdev
> itself.
>
> Mathieu, you should get a message like this
>
> 	unregister_netdevice: waiting for %s to become free. Usage count = %d
>
> What does your count say?
>
> Thanks,

sorry for the delay, the count, in this dump, is stuck at count 3.
unregister_netdevice: waiting for vbr447429 to become free. Usage count = 3


-- 
Mathieu
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